Z Axis Plunging too Deep into part < part zero, tool offsets, turns ratio >

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milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Z Axis Plunging too Deep into part < part zero, tool offsets, turns ratio >

Post by milling »

I have an issue that i am running into with the Z axis running too far into the part. I recently bought the acorn board from centroid and converted my pm25 matthews to CNC. I am using Stepperonline motors and drivers. A NEMA 34 on the Z and NEMA 24's on the X and Y axes. The problem I am having is that the Z axis seems to have a mind of its own and sometimes will plunge way into the part and other times it will appraoch fast and then comes almost to a stop before it plunges into the part as it should. I believe i set everything up correct as far as tools are concerned and the part. So for the tools I changed parameter 3 to a 2.0, which set the Z REF to home. I then have six tools that I set up and toched off a 123 block off the top of the x table top- so the tools are all reference from the home position. I put a part in the vise and went to part setup and brought the tool down to the middle of the part (in this case) and let x, y, and z all be 0, and set the tool to the proper # in the z. I try to run the part and as I was saying it plunges way into the part (noramlly) sometimes it does the right thing. I have tried shoutting everything down and re-running and i don't think it makes a difference. I am using wood right now as it is forgiving , but am afraid to use steel or aluminum as I never know what the z axis is going to do.

Please help!

Thanks
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milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Re: Z Axis Plunging too Deep into part

Post by milling »

Forgot to add that the tool is supposed to practically stop about .1" before the top of the part and then slowly enter the part. It has done this for me as it is sipposed to- but it noramlly plunges way into the part. I have had settings of .25" total depth on say a pocket and the tool may plunge in .300 or even more?
martyscncgarage
Posts: 7490
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Location: Mesa, AZ

Re: Z Axis Plunging too Deep into part

Post by martyscncgarage »

Hi, we'll try and provide suggestions if you would be so kind as to follow the instructions in the post:
viewtopic.php?f=60&t=1043

We can't "See" what you "See".
It sounds to me like you may not be setting your tools up correctly.
Please take the time to watch this Centroid Mill Training Video:

Its well worth an hour of your time.

Next, check out the Mill Operator's Manual:
https://www.centroidcnc.com/centroid_di ... -v4.14.pdf

Next, post the G code of program giving you trouble. Maybe we can take a look at it.

Lastly, I looked at your Errors log (F7 Utilities, F9 Logs, F1 Errors)
I see some Ethernet PC/MPU Resends, you should look to see why you are getting those usually caused by Interference, VFD wiring, ground loops:
(1) 01-02-2021 13:39:27 199 CNC Started
(4) 01-02-2021 13:39:33 944 MPU requested resend # 15
(4) 01-02-2021 13:39:34 946 PC resending # 723
(1) 01-02-2021 13:39:37 CNC12 Acorn Mill v4.50
(4) 01-02-2021 13:39:38 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 13:39:38 944 MPU requested resend # 16
(4) 01-02-2021 13:39:38 946 PC resending # 735
(4) 01-02-2021 13:39:47 4032 Reset Cleared
(1) 01-02-2021 13:39:48 FAST_JOG_SELECTED
(4) 01-02-2021 13:40:46 944 MPU requested resend # 17
(4) 01-02-2021 13:40:46 946 PC resending # 741
(4) 01-02-2021 13:41:19 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 13:41:19 4032 Reset Cleared
(4) 01-02-2021 13:41:21 944 MPU requested resend # 18
(4) 01-02-2021 13:41:21 946 PC resending # 747
(4) 01-02-2021 13:41:21 944 MPU requested resend # 19
(4) 01-02-2021 13:41:21 946 PC resending # 774
(4) 01-02-2021 13:41:21 946 PC resending # 796
(4) 01-02-2021 13:42:39 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 13:42:40 4032 Reset Cleared
(4) 01-02-2021 13:43:16 944 MPU requested resend # 20
(4) 01-02-2021 13:43:16 946 PC resending # 799
(1) 01-02-2021 13:46:44 204 Exiting CNC...Normal Exit (66)
(1) 01-02-2021 13:46:47 199 CNC Started
(4) 01-02-2021 13:46:52 9039 Software Exited, Cycle E-Stop/Reset to Continue
(4) 01-02-2021 13:46:52 944 MPU requested resend # 20
(4) 01-02-2021 13:46:52 946 PC resending # 1002
(1) 01-02-2021 13:46:54 CNC12 Acorn Mill v4.50
(4) 01-02-2021 13:46:54 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 13:46:54 944 MPU requested resend # 22
(4) 01-02-2021 13:46:54 946 PC resending # 1053
(4) 01-02-2021 13:46:56 4032 Reset Cleared
(4) 01-02-2021 13:50:12 907 Y axis travel exceeded
(4) 01-02-2021 13:50:23 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 13:50:24 4032 Reset Cleared
(4) 01-02-2021 13:52:10 944 MPU requested resend # 23
(4) 01-02-2021 13:52:10 946 PC resending # 1058
(1) 01-02-2021 13:54:56 204 Exiting CNC...Normal Exit (66)
(1) 01-02-2021 13:55:21 199 CNC Started
(1) 01-02-2021 13:55:28 CNC12 Acorn Mill v4.50
(4) 01-02-2021 13:55:28 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 13:55:33 4032 Reset Cleared
(4) 01-02-2021 13:57:45 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 13:57:46 4032 Reset Cleared
(1) 01-02-2021 13:58:23 417 Abnormal end of job
(1) 01-02-2021 14:00:10 FAST_JOG_SELECTED
(4) 01-02-2021 14:03:14 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 14:03:16 4032 Reset Cleared
(4) 01-02-2021 14:03:45 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 14:03:47 4032 Reset Cleared
(4) 01-02-2021 14:06:20 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 14:06:21 4032 Reset Cleared
(4) 01-02-2021 14:07:54 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 14:07:55 4032 Reset Cleared
(1) 01-02-2021 14:08:47 204 Exiting CNC...Normal Exit (66)
(1) 01-02-2021 14:09:12 199 CNC Started
(1) 01-02-2021 14:09:18 CNC12 Acorn Mill v4.50
(4) 01-02-2021 14:09:18 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 14:09:21 4032 Reset Cleared
(4) 01-02-2021 14:11:44 9033 Reset Initiated, Press Reset to Clear
(4) 01-02-2021 14:11:45 4032 Reset Cleared
(1) 01-02-2021 14:34:17 204 Exiting CNC...Normal Exit (66)
(1) 01-04-2021 5:40:25 199 CNC Started
(4) 01-04-2021 5:40:30 944 MPU requested resend # 12
(4) 01-04-2021 5:40:30 946 PC resending # 632
(1) 01-04-2021 5:40:32 CNC12 Acorn Mill v4.50
(4) 01-04-2021 5:40:32 9033 Reset Initiated, Press Reset to Clear
(4) 01-04-2021 5:40:38 4032 Reset Cleared
(1) 01-04-2021 5:40:39 FAST_JOG_SELECTED
(4) 01-04-2021 5:41:06 944 MPU requested resend # 13
(4) 01-04-2021 5:41:06 946 PC resending # 634
(1) 01-04-2021 5:41:38 Creating report...


Just some things to get you started in looking at and providing us some more information. Please take a picture of your control cabinet and post here. Did you use shielded VFD cable from your VFD (assuming you are using a VFD) to your spindle motor? How is the shield grounded. (Just guesses here....)
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
martyscncgarage
Posts: 7490
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Location: Mesa, AZ

Re: Z Axis Plunging too Deep into part

Post by martyscncgarage »

Also, always press F8 GRAPH before you run the program. CNC12 will read through the entire program, compare it to how you have your Part Zeros set and tell you if you have any errors. Don't run the program if you have errors.

Also common mistake to think about, when you set your Z0 MAKE SURE YOU ENTER THE TOOL NUMBER you are using from your tool library to set the Part Zero.

Again, with out knowing specifics, these are just some general suggestions.
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Re: Z Axis Plunging too Deep into part

Post by milling »

I did the graph F8 and there were no errors. Program runs without any erroRs. Also I watched a video that CNCKEITH did and followed that to do the tool setup. I also did enter the correct tool # when setting the Z0
milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Re: Z Axis Plunging too Deep into part

Post by milling »

Just so you know when I do the part setup the X and Y seem to do the right thing . The Z just does not seem to make any sense. I could see it being off a little bit but not this much
milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Re: Z Axis Plunging too Deep into part

Post by milling »

When I watched the video that Keith did- he suggested to change parameter 3 to a 2- which makes the z ref home. I then set up my tools using a 123 block off of the x table- and the numbers appear to make sense to me.
milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Re: Z Axis Plunging too Deep into part

Post by milling »

I do not have a vfd and the mill is started and stop by the hardware that came with the mill- it is independent of the acorn controller
milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Re: Z Axis Plunging too Deep into part

Post by milling »

Also, I want to make sure my axis are moving correctly- not very experienced with any of this so bear with me.

My x axis (the mill table) moves to the right when i click X- on the virtual panel
y axis (the mill table) moves toward me when Im standing in front of the mill when I click the Y + on the virtual panel
and when I click Z+ the mast moves up and when I click Z- the mast moves down
milling
Posts: 58
Joined: Mon Dec 14, 2020 5:41 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 3859

Re: Z Axis Plunging too Deep into part

Post by milling »

Any other info I can get you?
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